6
BM-300
Fig.6
Fig.5
Fig.7
2.2.3 Installing the objective (Fig.5-6
）
1. Adjusting the coarse focus knob until the
support device of the mechanical stage
reaches its low limit position.
2. Screw the lowest magnification objective
into the nosepiece from the left or the right
side, then revolve the nosepiece clockwise
and mount other objectives by the sequence
of low to high magnification
Installing objective this way will make the
change of magnification to be easier during
using.
Clean the objective regularly, for lens is
susceptible to dust.
When operating, use 10
×
magnification
objective to search and focus specimen
firstly, then replace with higher
magnification objective if necessary.
When replacing the objective, slowly
turn the nosepiece until you hear
“clicked”, that means the objective is in
place.
.2.4
Mounting the filters
（
Fig.7
）
1.
Place the required filter in front of the
condenser..
★
the filter of the standard outfit is green
and baby blue.
